MC74HC4538A Motorola, MC74HC4538A Datasheet - Page 2

MC74HC4538A

Manufacturer Part Number

MC74HC4538A

Description

Dual Precision Monostable Multivibrator

Manufacturer

Motorola

Datasheet

1.MC74HC4538A.pdf (13 pages)

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Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î

Î Î Î

Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î

Î Î Î

Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î

Î Î Î

Î Î Î Î Î

MOTOROLA

* Maximum Ratings are those values beyond which damage to the device may occur.

†Derating — Plastic DIP: – 10 mW/ _ C from 65 _ to 125 _ C

For high frequency or heavy load considerations, see Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D).

NOTE: Information on typical parametric values can be found in Chapter 2 of the Motorola High–Speed CMOS Data Book (DL129/D).

MAXIMUM RATINGS*

RECOMMENDED OPERATING CONDITIONS

MC54/74HC4538A

Symbol

Functional operation should be restricted to the Recommended Operating Conditions.

** The HC4538A will function at 2.0 V but for optimum pulse width stability, V CC should be above 3.0 V.

* The maximum allowable values of R x and C x are a function of the leakage of capacitor C x , the leakage of the HC4538A, and leakage due to

V CC

V out

I CC

T stg

board layout and surface resistance. For most applications, C x /R x should be limited to a maximum value of 10 F/1.0 M . Values of C x > 1.0 F

may cause a problem during power down (see Power Down Considerations). Susceptibility to externally induced noise signals may occur for

R x > 1.0 M .

I out

V in

P D

V in , V out

I in

T L

Symbol

V CC

t r , t f

R x

C x

T A

Î Î Î Î Î Î Î Î Î Î Î Î Î Î

DC Supply Voltage (Referenced to GND)

DC Input Voltage (Referenced to GND)

DC Output Voltage (Referenced to GND)

DC Input Current, per Pin

DC Output Current, per Pin

DC Supply Current, V CC and GND Pins

Power Dissipation in Still Air, Plastic or Ceramic DIP†

Storage Temperature

Lead Temperature, 1 mm from Case for 10 Seconds

Ceramic DIP: – 10 mW/ _ C from 100 _ to 125 _ C

SOIC Package: – 7 mW/ _ C from 65 _ to 125 _ C

Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î

DC Supply Voltage (Referenced to GND)

DC Input Voltage, Output Voltage (Referenced to GND)

Operating Temperature, All Package Types

Input Rise and Fall Time

A or B (Figure 5)

External Timing Resistor

External Timing Capacitor

(Figure 7)

Parameter

(Plastic DIP or SOIC Package)

Parameter

SOIC Package†

(Ceramic DIP)

A, B, Reset

C x , R x

Î Î Î Î Î Î

– 1.5 to V CC + 1.5

– 0.5 to V CC + 0.5

3–2

– 0.5 to + 7.0

– 65 to + 150

Value

750

500

260

300

V CC

V CC = 2.0 V

V CC = 4.5 V

V CC = 6.0 V

V CC < 4.5 V

4.5 V

Î Î Î

Unit

_ C

Î Î Î Î Î

3.0**

– 55

Min

1.0

2.0

—

circuitry to guard against damage

due to high static voltages or electric

fields. However, precautions must

be taken to avoid applications of any

voltage higher than maximum rated

voltages to this high–impedance cir-

cuit. For proper operation, V in and

V out should be constrained to the

range GND

tied to an appropriate logic voltage

level (e.g., either GND or V CC ).

Unused outputs must be left open.

This device contains protection

Unused inputs must always be

Î Î Î Î Î Î

High–Speed CMOS Logic Data

No Limit

(V in or V out )

+ 125

1000

V CC

Max

500

400

6.0

DL129 — Rev 6

Î Î Î

V CC .

Unit

_ C

MC74HC4538A Motorola, MC74HC4538A Datasheet - Page 2

MC74HC4538A

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